Bulk Metal Foil Ultra High Technology Precision Trimming Potentiometers, 3 / 8 " Square, RJ24 Style, Designed to Meet or Exceed the Requirements of MIL-PRF-39035, Char. H with a Smooth and Unidirectional Output INTRODUCTION (VFR) precision trimmers have the Bulk Metal Foil resistive element which possesses a unique inherent temperature and load life stability. Plus, their advanced virtually back lash-free adjustment mechanism makes them easy to set quickly and accurately and keeps the setting exactly on target. FEATURES Temperature coefficient of resistance (TCR): ± 0 ppm/ C (- 55 C to + 50 C ref. at + 25 C); through the wiper (2) ; ± 25 ppm/ C (see table 2 for low values) A smooth and unidirectional resistance with leadscrew adjustment Load life stability: 0. % typical R,.0 % maximum R under full rated power at + 85 C for 0 000 h Settability: 0.05 % typical; 0. % maximum Setting stability: 0. % typical; 0.5 % maximum Power rating: 0.25 W at + 85 C range: 5 to 0 k tolerance: ± 5 %, ± 0 % O -ring prevents ingress of fluids during any board cleaning operation Electrostatic discharge (ESD) up to 25 000 V Terminal finish: tin/lead or lead free BULK METAL FOIL WIREWOUND CERMET TABLE - MODEL SELECTION MODEL TERMINATION STYLE AVERAGE WEIGHT (g) POWER RATING at + 85 C AMBIENT NO. OF TURNS 260 W-edge mount, top adjust X-edge mount, side adjust 0.4 0.25 W 2 ± 2 Note See figure TABLE 2-260 (RJ24 STYLE) SERIES ELECTRICAL SPECIFICATIONS Temperature Coefficient of (TCR) 50 to 0 k End-to-end () Temperature Coefficient of (TCR) 5, 0 and 20 Through the wiper (2) Stability Load life at 0 000 h ± 0 ppm/ C maximum (- 55 C to + 50 C, + 25 C ref.) ± 20 ppm/ C ± 25 ppm/ C 0. % typical R.0 % maximum R (under full rated power of 0.25 W at + 85 C) Power Rating (3) 0.25 W at + 85 C Settability 0.05 % typical; 0. % maximum Setting Stability 0. % typical; 0.5 % maximum Contact Variation - CRV (noise) Hop-off High-Frequency Operation Rise/decay time Inductance Capacitance 3 typical; 0 maximum 0.25 % typical;.0 % maximum ns without ringing 0.08 µh typical 0.5 pf typical Operating Temperature Range - 55 C to + 50 C TABLE 3 - VALUES VS. TOLERANCES STANDARD RESISTANCE VALUES (in ) STANDARD TOLERANCE 5, 0 ± 0 % 20, 50, 00, 200, 500, K, 2K, 5K, 0K ± 5 % TABLE 4 - MECHANICAL SPECIFICATIONS Adjustment Turns 2 ± 2 Mechanical Stops Internal Terminations Case Material Shaft Torque Backlash Wiper idles - no discontinuity All welded - no flux Diallyl-phthalate: black (DAP) 0.005 % typical Document Number: 63054 For any questions, contact: foil@vishaypg.com www.vishayfoilresistors.com Revision: 8-Nov-2
FIGURE - SCHEMATIC AND DIMENSIONS in Inches (Millimeters) 260W 0.08 ± 0.00" (2.06 ± 0.25 mm) 0.080" (2.03 mm) maximum 0.420" (0.67 mm) maximum VFR 2 0.05" (0.38 mm) minimum 0.300" (7.62 mm) minimum 3 CW 260X ± 0.00" (± 0.25 mm)c 0.420" (0.67 mm) maximum 3 pins 0.024 ± 0.006" (0.6 ± 0.5 mm) diameter 0.00 ± 0.005" (2.54 ± 0.3 mm) 0.87 ± 0.020" (4.75 ± 0.5 mm) 0.080" (2.03 mm) maximum 0.08 ± 0.00" (2.06 ± 0.25 mm) 0.05" (0.38 mm) 0.300" (7.62 mm) minimum minimum 3 PINS 0.024 ± 0.006" (0.6 ± 0.5 mm) diameter 0.090 ± 0.005" (2.29 ± 0.3 mm) diameter 0.375 ± 0.05" (9.53 ± 0.38 mm) 0.70 ± 0.025" (4.32 ± 0.64 mm) 0.075 ± 0.00" (.9 ± 0.25 mm) VFR 2 CW 3 STANDARD MARKING: Model No. Date Code Value Tolerance Termination Finish - in case of Lead Free (L.F) NOTES: Adjustment screw 0.090" (2.29 mm) diameter with 0.020" (0.5 mm) x 0.03" (0.79 mm) slot. Model 260 has solder plated copper terminal pins. 0.024" (0.6 mm) diameter, 0.300" (7.62 mm) length minimum. ± 0.00" (± 0.25 mm) C 0.00 ± 0.005" (2.54 ± 0.3 mm) 0.87 ± 0.020" (4.75 ± 0.5 mm) 0.70 ± 0.025" (4.32 ± 0.64 mm) 0.075 ± 0.00" (.9 ± 0.25 mm) 0.090 ± 0.005" (2.29 ± 0.3 mm) DIA 0.375 ± 0.05" (9.53 ± 0.38 mm) FIGURE 2 - POWER DERATING CURVE Percent of Rated Power + 85 C + 00 + 75 + 50 + 25 0-75 - 50-25 0 + 25 + 50 + 75 + 00 + 25 + 50 + 75 Ambient Temperature C www.vishayfoilresistors.com For any questions, contact: foil@vishaypg.com Document Number: 63054 2 Revision: 8-Nov-2
TABLE 5 - COMPARISON TEST GROUP I Conditioning Immersion TEST GROUP Ia Visual and mechanical Actual effective electrical travel End resistance Dielectric withstanding voltage - DWV Per MIL-STD-202, methods 30 and 05 Atmospheric pressure Barometric pressure Insulation resistance Shaft torque Thermal shock Setting stability MIL-PRF-39035/2 CHARACTERISTIC H (4) ± No continuous stream of bubbles No failures 0 to 25 turns 2 % or 2 (5) 600 V AC, min 250 V AC, min 000 M 260 MAXIMUM No continuous stream of bubbles No failures 2 ± 2 turns 2 for values k; 5 for values 2 k; 600 V AC, min 250 V AC, min > 000 M TEST GROUP II Solderability Per MIL-STD-202, method 208 Per MIL-STD-202, method 208 TEST GROUP III temperature characteristic - TCR Moisture resistance Contact resistance variation - CRV (noise) TEST GROUP IV Settability Shock Vibration Salt spray TEST GROUP V Solder heat Low-temperature operation Low-temperature storage High-temperature exposure Integrity of shaft TEST GROUP VI Rotational life (200 cycles) Terminal strength TEST GROUP VII Life (2000 h) at + 85 C Life (0 000 h) at + 85 C ± 0.005 %/ C (± 50 ppm/ C) No corrosion ± 3.0 % No loosening or breakage 2 lbs. ± 3.0 % ± 5.0 % ± 0.00 %/ C (± 0 ppm/ C) ± 0. % No corrosion ± 0. % 3 typical, 0 maximum No loosening or breakage 2 lbs. ± 0. % typical, maximum ± 0. % typical, maximum TEST GROUP VIII Solvent resistance No failures No failures Notes () Maximum TCR applies to the 3 (sigma) limit or 99.73 % of a production lot. (Measured end-to-end with wiper off the element.) (2) Measurements of TCR through the wiper are influenced more by setting stability and the percentage of the total resistance in use (at the wiper) than by fundamental resistance change due to temperature alone. The parameter shown in table 2 is a 2 s distribution typifying the behavior of the device when used with 40 % or more of the total resistance in use. (3) Derated linearly for full power at + 85 C to zero power at + 50 C. See figure 2. (4) All R s are measured to the tolerance specified + 0.0. (5) Whichever is greater. Special available options: Special marking Power conditioning and screening operations. VFR TRIMMERS ARE INSPECTED 00 % for: Immersion tolerance check End resistance Visual-mechanical Dynamic tests for continuity, CRV By sample for: TCR DWV Document Number: 63054 For any questions, contact: foil@vishaypg.com www.vishayfoilresistors.com Revision: 8-Nov-2 3
TABLE 6 - GLOBAL PART NUMBER INFORMATION NEW GLOBAL PART NUMBER: Y0069500R000J0L (preferred part number format) DENOTES PRECISION VALUE CHARACTERISTICS () Y R = K = k 9 = lead (Pb) - free 0 = tin/lead termination to 999 = custom Y 0 0 6 9 5 0 0 R 0 0 0 J 0 L PRODUCT CODE TOLERANCE PACKAGING 0069 = 260W 4069 = 260X J = ± 5 % K = ± 0 % M = ± 20 % L = foam/box pack FOR EXAMPLE: ABOVE GLOBAL ORDER Y0069 500R000 J 0 L: TYPE: 260W VALUE: 500.0 ABSOLUTE TOLERANCE: ± 5.0 % TERMINATION: tin/lead PACKAGING: foam/box pack HISTORICAL PART NUMBER: 260W 500R00 J B B (will continue to be used) 260W 500R00 J B B MODEL RESISTANCE VALUE TOLERANCE TERMINATION PACKAGING 260W 260X 500R00 = 500.00 J = ± 5 % K = ± 0 % M = ± 20 % S = lead (Pb)-free B = tin/lead B = foam/box pack Note () For non-standard requests, please contact application engineering. www.vishayfoilresistors.com For any questions, contact: foil@vishaypg.com Document Number: 63054 4 Revision: 8-Nov-2
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